?We are still aggressively searching and hoping to bring Celina Cass home,? he said.

A separate $5,000 reward from an anonymous citizen was announced for anyone who can provide information leading to Cass's whereabouts.

New Hampshire State Police Col. Robert Quinn said state police from Massachusetts, Vermont and Connecticut have offered to help and are sending resources.

?We are going to stay with this,? he said. ?We're going to do whatever it takes to locate this lost child.?

Authorities planned to offer updates in the investigation at 5:30 p.m. Sunday. Senior Assistant Attorney General Jane Young said there are no solid working theories in the case. "We still don't have her," she said.

Young said Saturday that dive teams were being brought to the area and that line searches would continue. She asked the media to stay in the area, because coverage of the case has produced hundreds of tips. She did not have an estimate on how many tips have come in.

About 225 tips had come in by Friday night.

A Vermont State Police caravan was seen rolling through West Stewartstown with a mobile command post.

People in towns surrounding West Stewartstown, N.H., say they are planning to hold a candlelight vigil every night until they have answers as to where Celina is.

Cass was last seen in her home Monday night at 9 p.m. and was not in her bed the next morning, according to her family.

Investigators say offering up a cash reward is the next logical step in a case such as Celina's because so many days have gone by with no information leading to her recovery.